White TPO single-ply membrane roof on a commercial building in Arizona

What Is TPO?

Thermoplastic Polyolefin — Modern Single-Ply Performance

TPO (Thermoplastic Polyolefin) is a single-ply roofing membrane made from a blend of polypropylene and ethylene-propylene rubber. It combines the durability of EPDM rubber with the heat-weldable seaming technology of PVC — delivering a roofing system that's both strong and cost-effective.

TPO's white or light-colored surface is highly reflective, qualifying most installations for ENERGY STAR ratings and Cool Roof credits. In Arizona's desert climate, this reflectivity translates to dramatically lower cooling loads and reduced energy bills for your commercial property.

Heat-welded seams stronger than the membrane itself
ENERGY STAR rated — highly reflective white surface
UV, ozone, and chemical-resistant membrane
Flexible in cold temperatures — won't become brittle
Cost-effective — lower installed cost than PVC

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Heat-Welded Seams

Unlike EPDM, which relies on adhesive or tape-bonded seams that can fail over time, TPO membranes are joined with hot-air welding equipment. The seam is actually stronger than the surrounding membrane — creating a watertight bond that doesn't degrade with age or UV exposure.

Energy-Efficient Cool Roof

TPO's highly reflective white surface reflects solar radiation rather than absorbing it. In Arizona, where dark roofs can reach 170°F+, a white TPO membrane stays significantly cooler — reducing heat transfer into your building and cutting HVAC energy costs by 15–25% in peak summer months.

Ideal for Commercial Buildings

TPO is available in 10, 12, and 15-foot wide rolls, making it efficient to install on large commercial rooftops with minimal seams. It accommodates a variety of attachment methods — fully adhered, mechanically fastened, or ballasted — allowing the right system for each building's structural requirements.

Chemical & Puncture Resistance

TPO resists damage from restaurant grease, oils, and chemical exposure — making it the preferred choice for food service facilities, restaurants, and commercial kitchens. Its reinforced scrim layer also provides excellent puncture and tear resistance for rooftop foot traffic areas.

1

Roof Survey & Engineering

We measure and document your roof, assess drainage requirements, note all penetrations and curbs, and determine the optimal attachment method and membrane thickness for your building's specific needs.

2

Deck Preparation & Insulation

The existing roof is removed or repaired as needed. Polyisocyanurate (polyiso) or EPS insulation is installed to achieve the required R-value, followed by a coverboard to protect the insulation during installation.

3

TPO Membrane Installation

TPO rolls are laid out and positioned. Depending on the attachment method, the membrane is either adhered with bonding adhesive, mechanically fastened to the deck, or secured with ballast. Precise alignment ensures clean, professional seam lines.

4

Hot-Air Welding

All seams, laps, flashings, and terminations are hot-air welded using automated robotic welders for field seams and hand welders for detail work. Seam widths and temperatures are carefully controlled and verified for complete fusion.

5

Seam Probe Testing & Final Inspection

Every seam is probe-tested to verify adhesion. We walk the entire roof, verify all flashings and details, and provide manufacturer warranty documentation with your completed project file.

How long does TPO roofing last?

Quality TPO roofing systems typically last 20–30 years when properly installed and maintained. Membrane thickness plays a significant role — we generally recommend 60-mil or 80-mil membranes for commercial applications in Arizona's demanding climate. Thicker membranes provide greater durability and longer service life.

How does TPO compare to EPDM or PVC?

TPO sits between EPDM and PVC in terms of cost and performance. EPDM (rubber roofing) is less expensive but typically dark-colored and uses adhesive seams. PVC is more chemical-resistant and has a longer track record but costs more. TPO offers PVC-like heat-welded seams at a lower price point, with a reflective white surface that outperforms dark EPDM for energy efficiency in Arizona's climate.

Can TPO withstand Arizona's extreme heat?

Yes. TPO is formulated to resist UV radiation, ozone, and high temperatures. Modern TPO membranes from leading manufacturers have excellent heat-aging resistance. The key advantage in Arizona is that TPO's white reflective surface means the membrane itself stays cooler than dark-colored systems — significantly reducing thermal stress compared to black EPDM roofs.

What thickness TPO do you recommend?

For most commercial applications in Arizona, we recommend 60-mil TPO as the minimum and 80-mil for high-traffic areas or roofs with heavy HVAC equipment. The additional investment in thicker membrane pays off in durability and longer warranty coverage. We'll specify the appropriate thickness based on your building's use, foot traffic requirements, and budget.

TPO Roofing